const fileManager = new GoogleAIFileManager(apiKey);

// URL-based upload (serverless)
await fileManager.uploadFile("https://example.com/file.pdf", {
  mimeType: "application/pdf"
});

// Binary upload (serverless)
const buffer = await fetch("...").then(r => r.arrayBuffer());
await fileManager.uploadFile(buffer, {
  mimeType: "application/pdf",
  name: "document.pdf" // required for binary inputs
});

// Node.js (unchanged)
await fileManager.uploadFile("./local/file.pdf", {
  mimeType: "application/pdf"
});